Mold for concrete walls.



'NO. s72,750. PATENTED DEC. 3, 1907. J. L. RICHARDSON.

MOLD FOR CONCRETE WALLS.

APPLICATION FILED mmze, 1907i THE NORRIS PETERS cm, WASHINGTON, a. c.

0 I PATENTED DEC. 3, 1907.

J. L. RICHARDSON.

MOLD FOR CONCRETE WALLS. APPLICATION FILED umze, 19-07.

' 2 SHEETS-SHEET 2.

WITNESSES: rl l //w ATTORNEYJ' JOHN L. RICHARDSON, OF BLOOMSBURG, PENNSYLVANIA.

MOLD FOR CONCRETE WALLS.

Specification of Letters Patent.

Patented Dec. 3, 1907'.

Application filed January 26, 1907. Serial No. 354,262.

To all whom it may concern:

Be it known that I, JOHN L. RICHARDSON, a citizen of the United States, residing at Bloomsburg, in the county of Columbia and State of Pennsylvania, have invented cer tain new and useful Improvements in Molds for Concrete Walls, of which the following is a specification.

My invention relates to a mold for the construction of concrete walls, abutments, piers, buttresses, and like structures, and embodies the several features hereinafter described and more particularly pointed out in the claims.

In the accompanying drawings which form part of this specification Figure 1 is a top view of a portion of a wall in process of construction illustrating the use of three different units; Fig. 2 a vertical section of the mold showing one course completed and the next in process of construction; Fig. 3 aside elevation of one of the mold units; Fig. 4 a vertical section of the core, with the spreader used in connection therewith in elevation; Fig. 5 a horizontal section on the plane of the line 55 of Fig. 4; Fig. 6 a face view of the .clamp for joining adjacent units; Fig. 7 a

top view of said clamp; Fig. 8 a side elevation of a unit having an interposed splice plate; Fig. 9 a detail section on the plane of the line 99 of Fig. 8; Fig. 10 an enlarged detail view of the fastening between the two sections of one of the mold units and the splice plate; Fig. 11 an elevation of a portion of a corner unit; and Fig. 12 a to view of a section of the wall showing tie ro s in position.

Similar reference numerals indicate similar parts in the several views.

In the present drawings I have illustrated the invention as adapted to the construction of a hollow wall, that is, one having an air' space between the wall sections, although it will be obvious that several features of the invention are applicable to the building of a solid wall. The mold as a whole is built up of several units and, as these have several features in common, I will first describe such features.

Referring more particularly to Figs. 2 and 3, the mold unit there shown comprises outer form plates 1, preferably made of sheet iron, and bent so as to have laterally projecting flanges 2 and 3 along their upper and lower edges respectively. These plates are about two feet in height, six feet in length, and the flanges project about one inch.

receive a coupling rod 5 having an adjustable nut 6 at one end for the purpose of clamping the plates together.

If a hollow wall is to be built, I provide a core for forming the air space consisting of plates 7 and 9 having laterally projecting flanges 8 and 10 respectively. As shown in Figs. 2 and 4, these flanges are of such width as to permit the ready assemblage and removal of the core plates, and the upper flange 10 is of substantially the width of the air space to prevent the falling of the concrete mixture thereinto. The core plates 7 and 9 are of greater width than the outer plates 1 to permit them to project downwardly into the air space of the preceding course. The core plates 7 and 9 extend in substantially parallel planes and to hold them in proper alinement and adjustment I provide spreaders 'at suitable intervals. Each spreader consists of a block 11 having a reduced lower end 12 which is stepped into a suitable bracket 13 secured to the side of the plate 9. The upper reduced end 14 of the block proj ects through and has a bearing in an opening in the upper flange 10 of the plate 9. The projectin end 14 is adapted to be engaged by a suitab l e tool for rotating the spreader when the core is to be collapsed or when setting it in position for tamping. In the former case the spreader is swung back against the side of plate 9; in the latter suitable stop pins 15 secured to plate 7 prevent the overthrow of the spreader.

In practice the several plates described may be of any desired length and width, and the wall sections may be of the same or variable width depending upon the length of the U-shaped spacing blocks 16 adapted to be placed over the coupling rods 5, as indicated in Fig. 2, and bearing between the outer plates and the sides of the core.

The foregoing description applies generally to the several mold units illustrated in the drawings. For the construction of a dwelling, for example, having straight walls, two sets of units will be required; one as indicated in Fig. 1 extending between the lines 1717, and a corner unit extending from 17 to 18. This latter unit differs from a unit for a straight section of the wall only in that the plates of the two sections thereof are bent at the proper angle and reinforced lb y gusset plates 19, as more'clearly seen in If the wall to be built has an offset as for a bow window of the form indicated in Fig. 1, the mold will comprise a unit, extending from 17 to 20, having two corner sections 21 and 22, the contiguous ends of which are shown in Fig. 8. To adapt this unit to the particular length of the section between the angles I provide splice plates 23 which overlap the ends of the outer plates 1 of the angle sections, the properadjustment of the splice plates being effected by means of threaded bolts 24 carrying clamp screws, said bolts being secured to said plate and extending through slots 25 in the adjoining plates 1. The use of-splice plates is of advantage in that a variety of forms is permissible with one set of molds.

In laying a course of any desired length the several units are assembled by abutting their ends and securing them together. A convenient means illustrated in the drawings consists of a clamp comprising a keeper 26 secured to a base 27 adapted to be secured to one end of the plates 1. On the end of the abutting plate is a base piece 28 having an integrally projecting lug 29 on which is pivoted a yoke 30. This yoke is bifurcated at 31 to receive a pivoted handle 32, the head 33 of which acts. as a cam. When the units are to be locked together the parts' are brought into such relation that the keeper 26 will project into the yoke 30 and will lie between lug 29 and the cam head 33. By turning handle 32 to the position shown in Figs. 6 and 7 the lug 29'will be brought tight against keeper 26. Each outer plate will preferably have two of these clamps. After the outer plates have been assembled the core is placed in position. In laying the first course the core is seated in a groove 34 formed in the footing. The core and the outer plates are then securely clamped together by ti htening up the nut 6 after the coupling ro s 5 have been placed in position and the U- shaped spacing blocks placed on said rods. The mold may be completed around the entire building in a single course or it may be constructed in sections as desired. When the mold has been set up for the first course it is filled with concrete prepared in any well known or usual manner and the composition allowed to set sufficiently before the mold is dismantled. hen the first course has set sufficiently the core is withdrawn by swinging the spreader 11 so that it will lie against the side of plate 9. This permits the core to be collapsed so that it may be easily raised into position for the next course. While the second course is being laid the outer plates 1 are permitted to remain in position on the first course.

To-enable the plates l of a mold section for any course other than the first to be properly positioned I out said plates at 35 so as to provide openingswhich enable said plates to be dropped over the coupling rods 5 of the next lower course. The core plates 7 and 9 are similarly cut at 35 so as to fall in alinement with the openings 35 of the outer plates to permit the core to rest upon the coupling rods 5. I also cut the core plates 7 and 9 at 36 to permit them to rest upon tie rods 37 which are set into the wall and form a per manent part thereof.

WVhen a given course has set sufficiently the outer form plates of the next lower course are removed by withdrawing the coupling rods 5 and releasing the clamps which join the several units at their abutting ends. The openings in the wall made by the coup ling rods 5 may be filled or covered after the removal of the mold.

A set of mold units, as herein described, is adapted to the building of walls of various thickness and outline without special or additional appliances. The wall may be tapered as it progresses by simply changing the spacing blocks 16 on the coupling rods 5. The air space formed by the core may extend throughout the wall or only partly, as may be desired, depending upon the length of the core. If the air space is not continuous the wall will be formed with webs extending be tween the outer and inner sections; If a solid wall is to be built I omit the core but retain all the other features of the mold.

What I claim and desire to secure by Letters Patent of the United States is:

1. A mold consisting of a series of units comprising form plates, clamps having keepers secured to one of the plates of abutting units and a pivoted yoke adapted to engage said keeper secured to the other of said plates, a cam carried by said yoke to effectively lock the parts together, the plates of each unit also having straps secured to the sides thereof, coupling rods connecting the straps of opposite plates, a core, and U- shaped spacing blocks adapted to be seated on said rod between the form plates and the core.

2. A mold for the purpose described comprising form plates having outwardly turned flanges, straps secured to the sides of said plates and extending through openings in the upper of the flanges, a coupling rod connecting each pair of straps, a core, and spacing blocks adapted to be seated on said rod between the form plates and the core.

3. In a mold the combination of outer form plates, a core, a coupling rod connecting said plates, and U-shaped spacing blocks adapted to be seated on said rod between the form plates and the core.

4. In a mold the combination of outer form plates, a coupling rod connecting said plates, a core consisting of plates having oppositely disposed flanges, all of said plates having alined openings adapting them to be seated on a coupling rod of a corresponding mold section of the next lower course.

-5. In a mold the combination of outer form plates, a coupling rod connecting said plates, a core consisting of plates having op positely disposed flanges, said core plates being of such length as to extend below the form plates, all of said plates having alined openings adapting them to be seated on a coupling rod of a corresponding mold section of the next lower course.

. 6. A mold unit consisting of form plates having outwardly turned flanges, straps secured to the side of said plates and extending through openings in the upper of the flanges, a core having oppositely disposed flanged plates, a coupling rod connecting a pair of said straps, and spacing blocks adapted to be seated on said rod between the form plates and the core plates.

7. A mold comprising form plates, a core consisting of parallel plates of greater width than the form plates and having inwardly turned flanges at the top and bottom thereof, a spreader extending widthwise of said core plates and adapted to be rotated for the purpose described, said spreader having a bearing at its lower end in a bracket secured to the side of one of said plates and a bearing at its upper end in the flange of the same plate, and a stop pin on the opposite plate to limit the throw of the spreader.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JOHN L. RICHARDSON. Witnesses:

A. O. CREAsY, H. J. PURSEL. 

